试用fastJSON

实体类

User.java

 package com.test.fastjson.entity;

 import java.util.Date;

 public class User {
     private Long id;
     /**
      * 登录名
      */
     private String loginName;
     /**
      * 用户名
      */
     private String userName;
     /**
      * 手机号码
      */
     private String cellNO;

     /**
      * password
      */
     private String password;
     /**
      * update时间
      */
     private Date updateDate;

     private String sex;

     private Classes classes;

     /**
      * 是否可用
      * [JPA没有boolean类型,在get/set方法中修改. 持久导的实体属性使用Character类型，则领域层可直接使用boolean类型。]
      */
     private Character enabled;

     // setter/getter

     public Boolean getEnabled() {
         if (enabled == null)
             return null;
         return enabled == 'Y' ? Boolean.TRUE : Boolean.FALSE;
     }

     public void setEnabled(Boolean enabled) {
         if (enabled == null) {
             this.enabled = null;
         } else {
             this.enabled = enabled == true ? 'Y' : 'N';
         }
     }

     public String getLoginName() {
         return loginName;
     }

     public String getSex() {
         return sex;
     }

     public void setSex(String sex) {
         this.sex = sex;
     }

     public void setLoginName(String loginName) {
         this.loginName = loginName;
     }

     public String getUserName() {
         return userName;
     }

     public void setUserName(String userName) {
         this.userName = userName;
     }

     public String getCellNO() {
         return cellNO;
     }

     public void setCellNO(String cellNO) {
         this.cellNO = cellNO;
     }

     public Long getId() {
         return id;
     }

     public void setId(Long id) {
         this.id = id;
     }

     public String getPassword() {
         return password;
     }

     public void setPassword(String password) {
         this.password = password;
     }

     public Date getUpdateDate() {
         return updateDate;
     }

     public void setUpdateDate(Date updateDate) {
         this.updateDate = updateDate;
     }

     public Classes getClasses() {
         return classes;
     }

     public void setClasses(Classes classes) {
         this.classes = classes;
     }
 }

classes.java

 package com.test.fastjson.entity;

 import java.util.List;

 public class Classes {

     private String name;
     private List<User> u;

     public String getName() {
         return name;
     }
     public void setName(String name) {
         this.name = name;
     }
     public List<User> getU() {
         return u;
     }
     public void setU(List<User> u) {
         this.u = u;
     }

 }

testClient

 package com.test.fastjson;

 import java.util.Date;

 import com.alibaba.fastjson.JSON;
 import com.alibaba.fastjson.serializer.SerializerFeature;
 import com.test.fastjson.entity.Classes;
 import com.test.fastjson.entity.User;

 public class testFastjson {

     public static void main(String[] args) {
         Classes c=new Classes();
         c.setName("class one");

         User u=new User();
         u.setCellNO("1555555555");
         u.setId(232323L);
         u.setUpdateDate(new Date());
         u.setClasses(c);

         //obj2str 序列化
         String str=JSON.toJSONString(u);
         System.out.println(str);
         //str2obj 反序列化：
         User u2=JSON.parseObject(str, User.class);
 //        Object o=JSON.parse(str);
         System.out.println("cellNO= "+u2.getCellNO()+" UpdateDate= "+u2.getUpdateDate()+" class= "+u2.getClass().getName());

     }

 }

执行效果

{"cellNO":"1555555555","classes":{"name":"class one"},"id":232323,"updateDate":1421047634650}
cellNO= 1555555555 UpdateDate= Mon Jan 12 15:27:14 CST 2015 class= com.test.fastjson.entity.User